Chain: McDonald's
Introduced: 1982 

The McRib's penchant for vanishing for long stretches and suddenly reappearing has created a cult following that's unique among fast food item in the U.S. McDonald's representatives have said that the product doesn't sell well enough to stay on the menu year-round, but the existence of a website and smartphone app dedicated to tracking McRib sightings indicates what the numbers may not: that the people love their McRibs.